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Abstract

Disclosed is a device for conversion of energy of electrons in a channel plate array to photons in an optical fiber array.

Country

United States

Language

English (United States)

This text was extracted from an ASCII text file.

This is the abbreviated version, containing approximately
61% of the total text.

Efficient Particle-To-Optical Fiber Array Photon
Converter

Disclosed is
a device for conversion of energy of
electrons in a channel plate array to photons in an optical fiber
array.

Part of a
typical optical amplifier is shown in Fig. 1. The
light 1 falls on the electron emitting substance 2, and the electrons
3 emitted are accelerated in a channel plate array 4 and fall on to a
fluorescent coating 5 of an optical fiber array 6. The fibers
conduct the light generated in the fluorescent layer to the other end
of the fiber array 7, which may be arranged in a spherical surface to
match further optics. Several of these
stages may be used in a
high-gain system.

While more
photons come out the end of the device 7 than enter
at 2, the device shown in Fig. 1 could be more efficient. Only a
small fraction of the photons generated in layer 5 will be accepted
into the acceptance cone of one of the fibers in array 6.

The structure
shown in Fig. 2 will increase the photon
amplification factor of the device shown in Fig. 1. The energy of
the incident electrons 3 is deposited in a two-part scintillator made
with standard lithography techniques.
When electrons 3 fall on the
parabolically shaped plastic scintillator 8 placed over the fiber
core 9, photons 10 of short wavelength (say, less than 400 nm) are
produced. These photons are reflected
from the aluminized parabolic
surface 11 or the dichroic layer 12 evaporated over the surface o...